Car-brake



Taylor and State of Iowa, have invented cer- .UN ATES REASON A. BURGE AND EZRA AJQUINBY, OF MEMORY, IOWA.

CAR-BRAKE.

SPECIFICATION forming part of Letters Patent No. 226,275, dated April 6, 1880.

Application filed November 22, 1879.

To all whom it may concern:

Be it known that we,REASON A. BURGE and EZRA A. QUINBY, of Memory, in the county of tain new and useful Improvements in Brakes; and we do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the annexed drawings, making a part of this specification, and to the letters and figures of reference marked thereon.

Figure 1 of the drawings is a representation of a railroad-car, showing my brake applied; and Figs. 2 and 3 are detail views of the same.

The nature of our present invention relates to brakes for railroad-cars and other purposes; and it consists in the construction and arrangement of parts, as fully set forth in the following description, and particularly pointed out in the claim.

Referring by letter to the drawings, A designates a balance-wheel, which is mounted upon a vertical rod, B, for the purpose of rotating the same in order to throw the brakes on or off from the wheels of a car or other vehicle.

The lower screw-threaded portion, 0, of the vertical rod 13 works through a block, D, so cured at one end of the car, and at the upper terminus of the said screw-threaded part 0 is arranged a collar, E, which, when the rod is turned down so as to throw off the brakes, strikes against the block D, and thus limits the downward movement of the rod.

At the lower extremity of the rod is swiveled a link, F, to which is connected one end of a chain G. This chain is composed of the links and straps H H and is arranged to pass under a guide-pulley, I, and partly around the two segmental pulley-wheels K L.

The guide-pulley l, which bears against the chain, is supported in suitable bearings M, and serves to keep the upper end of the chain in line with the screw-rod, to which it is connected by the swiveled link.

The first segmental pulley, K, is provided with a tooth, K, which engages with one of the links of the chain Gr, and the second segmental pulley, L, is likewise provided with a tooth, L which engages with the chain in like manner.

After'passing along the faces of these segmental pulleys the chain G connects by a yoke with a rod, M, which passes along under the car and couples with a second rod, N, by means of a link, N, which screws upon the adjacent ends of these two rods, so that they may be drawn together for the purpose of taking up slack in the brake-chain and connecting mechanism.

The rod N connects with the lever O, which is swiveled to the brake-bar P at one end of the car, and to this lever O is also connected a third rod, P,'which is swiveled at its other end to the brake-beam Q at the opposite end of the car.

The segmental pulleys are journaled in suitable supports R, and are weighted attheir sides S, so that when the rod B is screwed down these pulleys will assume the position shown in Fig. 1, thereby pushing back the rods h and N, and thus throwing the brakes off from the wheels.

The rod B is formed with a left-hand screwthread, so that by turning the balance-wheel to the left the rod will be lowered so as to throw the brakes off, and by turning it to the right the said rod will be raised and the brakes thrown on.

In order to operate the brakes of another car by means of this mechanism, we may secure upon the rod B a grooved wheel, T, and from this communicate motion to a similar brake mechanism upon another car by means of an endless belt or chain.

It will be observed that as the rod B is being rotated and raised in its screw-threaded bearing, and the chain being consequently drawn up with the upward movement of the rod, the teeth upon the segmental pulleys will, as the pulleys are turned upon their axes, move in circular paths, as indicated by dotted lines, and hence the slack of the chain will be rapidly taken up, since by the rotation of the pulleys the chain will be forced out of the line in which it would otherwise travel were the pulley-wheels stationary.

It will also be evident that after about a quarterrevolution of these pulleys the screwrod will exert its full force upon the chain.

If desired, more than two of these segmental pulleys can be employed, although for general purposes two will be found sufficient.

In Fig. 3 we have illustrated aseroll-shaped l with their connecting-rods, all substantially as pulley, which may be used when greater leverherein shown and set forth. age in the pulleys is required than is attained In testimony that we claim the above We by the segmental pulleys first described. have hereunto subscribed our names in the 15 Having thus described our invention, what presence of two Witnesses. gteteliagig, and desire to secure by Letters Pat- REASON A BURGE- The balance-Wheel A, rod B, with serew- EZRA QUINBY' threaded end 0, block D, and link F, in combination with the chain G, segmental pulley- Wheels K L, with teeth K L and the brakes, i

Witnesses:

N. B. MOORE, THOMAS MUSGATROYD. 

